Jump to main content
Jump to site search

Issue 41, 2011
Previous Article Next Article

Efficient donor–acceptor type polymer semiconductors with well-balanced energy levels and enhanced open circuit voltage properties for use in organic photovoltaics

Author affiliations

Abstract

Three donor–acceptor type copolymers, poly[9,9′-dioctylfluorene-alt-2,5-bis(seleno-2-yl)-2,3-bis(4-hexyloxyphenyl)quinoxaline] (PFSeQ), poly[9-(1′-octylnonylidene)fluorene-alt-2,5-bis(seleno-2-yl)-2,3-bis(4-hexyloxyphenyl)quinoxaline] (PAFSeQ), and poly[N-9′-heptadecanyl-2,7-carbazole-alt-2,5-bis(seleno-2-yl)-2,3-bis(4-hexyloxyphenyl)quinoxaline] (PCSeQ), were synthesized through Suzuki coupling reactions for use as organic photovoltaic materials with high VOC values. In these polymers, selenophene, which has stronger electron-donating property than thiophene, was adopted as a spacer. The polymers had relatively low optical band gaps (<1.9 eV). We investigated bulk heterojunction type polymer solar cells based on the synthesized polymers used as electron donor materials and [6,6]-phenyl C61 butyric acid methyl ester (PC61BM) or [6,6]-phenyl C71 butyric acid methyl ester (PC71BM) used as the acceptor. The power conversion efficiency (PCE) of the devices was in the range of 1.1–3.3% under AM 1.5G illumination (100 mW cm−2). Among these polymers, PFSeQ exhibited the best device performance with a power conversion efficiency (PCE) of 3.3% upon the introduction of PC71BM as the acceptor. This is the highest performance among photovoltaic materials containing selenophene units.

Graphical abstract: Efficient donor–acceptor type polymer semiconductors with well-balanced energy levels and enhanced open circuit voltage properties for use in organic photovoltaics

Back to tab navigation

Publication details

The article was received on 14 May 2011, accepted on 05 Aug 2011 and first published on 15 Sep 2011


Article type: Paper
DOI: 10.1039/C1JM12145F
Citation: J. Mater. Chem., 2011,21, 16480-16487
  •   Request permissions

    Efficient donor–acceptor type polymer semiconductors with well-balanced energy levels and enhanced open circuit voltage properties for use in organic photovoltaics

    J. Lee, S. Kim, I. Song and D. Moon, J. Mater. Chem., 2011, 21, 16480
    DOI: 10.1039/C1JM12145F

Search articles by author

Spotlight

Advertisements